We must all obey the great law of change. It is the most powerful law of nature.
To be interested in the changing seasons is . . . a happier state of mind than to be hopelessly in love with spring.
If man limits himself to a satisfied animal existence, and asks from life only what such an existence can give, the higher values of life at once disappear.
Certain signs precede certain events.
Do not wait for the last judgment. It comes every day.
Science is the most reliable guide for civilization, for life, for success in the world. Searching a guide other than the science is meaning carelessness, ignorance and heresy.
Life can only be understood backwards; but it must be lived forwards.
By putting forward the hands of the clock you shall not advance the hour.
The joy in life is his who has the heart to demand it.
Life is tough, but it's tougher when you're stupid.
In the survival of favoured individuals and races, during the constantly-recurring struggle for existence, we see a powerful and ever-acting form of selection.
One doesn't recognize the really important moments in one's life until it's too late.
Rudeness is the weak man's imitation of strength.
I am not young enough to know everything.
The essence of life is statistical improbability on a colossal scale.
The story of life is quicker than the wink of an eye, the story of love is hello and goodbye...until we meet again
Colors, like features, follow the changes of the emotions.
I'd trade all my tomorrows for a single yesterday.
You can give in to the failure messages and be a bitter deadbeat of excuses. Or you can choose to be happy and positive and excited about life.
Open your arms to change, but don't let go of your values.
All my life through, the new sights of nature made me rejoice like a child.